65026269520 has 40 divisors (see below), whose sum is σ = 152573125320. Its totient is φ = 25771875840.

The previous prime is 65026269481. The next prime is 65026269523. The reversal of 65026269520 is 2596262056.

It can be written as a sum of positive squares in 4 ways, for example, as 6080256576 + 58946012944 = 77976^2 + 242788^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65026269523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3719851 + ... + 3737290.

It is an arithmetic number, because the mean of its divisors is an integer number (3814328133).

Almost surely, 2^65026269520 is an apocalyptic number.

It is an amenable number.

65026269520 is an abundant number, since it is smaller than the sum of its proper divisors (87546855800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65026269520 is a wasteful number, since it uses less digits than its factorization.

65026269520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457263 (or 7457257 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 65026269520 in words is "sixty-five billion, twenty-six million, two hundred sixty-nine thousand, five hundred twenty".